Automatic lathe with revolving turret



g- 5, 1952' V G. E. CUTTAT 2,605,538

AUTOMATIC LATHE WITH REVOLVING TURRET Filed Feb. 21, 1948 3 Sheets-Sheet '1 Aug. 5, 1952 G. E. CUTTAT 2,605,538

- AUTOMATIC LATHE wrrn REVOLVING TURRET F;1a Feb. 21-, 1948. I s Sheets-Sheet 2 Aug. 5, 1952 G. E. CUTTAT I AUTOMATIC LATHE WITH REVOLVING TURRET Filed Feb. 21, 1948 5 Shee ts-Sheet 5 Patented Aug. 5, 1 952 accesses (signer.

De Machines-711i; Hami ithin,fMulhouseeBourtzwillcr, France a H l zApplicaticmFebnua; y 21, 1948, Serial '-N0. 1 0,1 '53 picking up said work froma chuck on-the, lathe when the turret is in.;.,one position and, when in another position, @presenting thewf me to said machining means to be ad -tional ly vmachined 1 1 1 According to one feature of thepresen-t invention saidv auxiliary machining Jmeans consist essentially of an electrically 'driven too'l adapted for desired additional machininggof the workiin point and a displaceablezholdingfideviceI ing part of said machining nieansanda" to receive the work 'frorn 'thenafores'aid jgpping means, hold the sameldu ring .saidl' machining and eject the workafter'thisfrhadhirfing; v j

According to further .ie'atilfe' o' f 'the present invention the lathe turret pmnaed summon: gripping means whereby ithelw'ork lpick'e'd .ju'p from the lathe iis-pre'sentedtolilaind taken by, the holding device ofjaforles'aidniachining means in a position, jdiaine'tiallyfinverted witn respct to its [previous position .Oh' ithe Ilathe, i'sucn inverted position (if the'iwbifk 'bfih'g. iiilm ltiialiif desired additionaljmachining is other than for exampleunileitraldfilling.1 f i According to yet a ifurther "ffea'tiire' or the present invention the "lathe "turret "is provided with work gripping means whereby LtheQWork picked up ,from 'a chu'k. on thellathegiscailsed, during the subsequent ,rotationTOf the turret, to turn axially through (1'80'degrees and,fconse quently, presents itself to the holding deviceof said auxiliary Qmachining'meansf in a position identical with its ,previous position on lthe llathe and suitable for ,any desire: additional machinng, e l The operational motions of the aforesaidauxiliary machining means are; controlledlpreferably from the camshaft of the lathe, in accordance with the operational motions tofthe lathe. and its turrets I Further features of the present invention will be apparent from the-followingadescriptioniand appendedclaims. I

The invention willIbe-rdescribed :with reference to the accompanying diagrammatic idraw-ingsgin whichr.

Fig.1 is an showing in operativercombination :a" lathepits revolving turret, a l fom.. of

xelev'ationa'lt vi'ew, :part1y::in =section,

awork ig'ripping :ar-x

iGIm: castes tor Fig; 5,

:InErancelMarch I3, 1947- (algae-'39),

v I2 rangement -;revol-v ed jby said turret, and auxiliary machining meansadded thereto accord ingto the-present-invention; V a vFig. :2is a rearviewpf the :auxiliarymachining means of ;Fig.;;1;;- I

sl ts-33:15 a plan View of the auxiliary machinin ;m a s0f'-Hgs..1iand2;, i n l :Fig. 4:is'=-a view partly similar to Fig, 1, show i'ngzfa, :further {form of work gripping; arrangement -rev.olved by {the lathe turret according to the presentginventiom f, H w c Fig.5:i5 an enlarged-externalviewpfi the form of worlkl-eripp ae a ran ment of Fi and v Eigs fig 7 and 8 4 are detail views corresponding In Figs. 1 to 4, inclusivefsimilar numerals of reference indicate like partsthroughout the s v a .-vi w-; r v

Just'beforebeing severed from; bar, if any, the work-pieee is;gripped on thec hucik i by means of -a prehensile "device; of any vknown construction =2 .providedon onehf the Inxtures, of the lathetnrret 3, "Inn-tie qrsaof revolution of theturret 13 the said'work-piece is presented right, exert, a ,pull on,

to :the auxiliary machining appliance located at the right of Fig. 1 and provided, e. g., with a driller-4 ,(Fig. 3) adapted to operate atrig-ht angles-to the work. r

Said 1- auxiliary, machining appliance comprises ai spindle 5 mounted in hearings 16, 1 'one of each, 6, is displaceable and theother, .1, stationary. Located within th spindle 5fis a resilient lgrip ping device; 8,=having ,its outward end externally cone-shaped, cooperating with "the internally coneeshaped end of .the spindle-5i The gripping deviee 2 8 is attached to lonezend of the ShaftTBLthethenend of which is provided with a flange ll. Aflspring gripping devicegflto.the'left .into releasing position. II-The gripping-effect is secured by dogs H! :which tend-to move away from each other and cooperate with ra grippingsleeve [4 controlledby a ;lever 15 .(Fig- 3) whiehvin turn is controlled, through appropriate 'nterinediate means, --by two cams: l6 for gripping and ilfor releasing, these two cams being keyed to the camshaft 18 which is preferably the general camshaft of the lathe. ,It will be seenathat in the position shown -inFig l the sleeve M acts upon :the'ireeends ofthe dogslS and these, by -pushing the vflange II from the left tothe the shaft e that the device '8, is gcaused j to produce a gripping efiect. When the sleeveli4- is imovedirom ,the leftIto the: right: the-free ends ,-of :the dogs! [3 {get loose;

.12 tends to push the and the dogs let go their hold on the flange H, whereby the device 8 is thrown out of grip.

Located within the holder 8' is a bushing I9 urged by a spring 2|. This bushing serves to eject the Work when the holder gets loose. In Fig. 1 the bushing l|9 is shown in its position of ejection and in Fig. 4 in its retracted position.

Mounted at the spindle end and supported by the stationary bearing 1 is a divider 22 of any suitable type that permits of imparting angular displacements to the spindle and hence to the work, if the latter has several holes to be drilled turret 3 in the sense of arrow P (Fig. 4), the

button comes'in contact with the incline 53.

' Following this incline the button moves along the guide slot 49 and drags with it the rack 50 which in it or various facets to be milled on it at regular angular distances. Said divider hasfat itsoutward end a disk 23 provided with one or more notches and controlled by an indicator of position 24 (Fig. 2) pivoted to the machine frame Automatic 7.

and acted upon by a dash-pot 25. motions of the divider are brought about, through appropriate intermediate means, by a cam 26 (Fig. 1) keyedto the shaft 8;

The displacement bearing '5 is mounted on -a part 2'! that may slide with respect to the stationary bearing 1 and is constantly acted upon by a spring 28 one end of which is attached to it, while the other end thereof 'is attached to a part rigid with the stationary bearing 7. The displacements of the bearing 6 are controlled, through appropriate intermediate means, by the cam 29 in one direction and by the cam 28 in the-other direction. To permit displacements of themovable bearing 6 the spindle, which isri'gid-with' the'divider 22 for rotatiommay be given a motion of translation with respect thereto by means of longitudinal grooving. I

In the example of auxiliary machining means illustrated in Figs. 2 and 3, the work handled is supposed to be subjected to drilling by means of a driller 4 driven by an individual electric motor 3| which, throughythe medium of a coupling 32 and appropriate gearing, rotates a tool-holder 33. Feeding and withdrawal of the'tool-holder and its tool are determined by a cam 34, elbowed lever 35, connecting rod 36 and elbowed lever 31. I I

In the mode of construction of the apparatus that has Just been described, the work-piece handled is presented, for the purpose of being charged into the auxiliary machining means, diametrally inverted with respect to the diametral position in which it was on the chuck.

In the modes of construction shown in Figs. 4 to 8, inclusive, the work in point. while passing from its position on the chuck to its position of charging into the auxiliary machining means, is caused to turn axially through 180 degrees so that it presents itself to the auxiliary machining means in the same situation as on the chuck.

To this end, the gripping device 2 shown in Fig. 1 is replaced by a carrier constituted by a fixed fork 4| in which there is arranged a box 43 pivoting on two journals 42 and 42'. Arranged within the box 43 is a-yieldable gripping device 44 adapted to grip the work-piece 45 additionally maintained by lever arms 46 urged by springs 41. One of the journals, 42, is provided with teeth in mesh with a rack 50 (Figs. and 7) slidable in a bore managed in the fork 4|, said rack being provided with an external button 48 adapted to move in --a longitudinalguide-slot 49 managed in the fork 4| over-the rack 50. The box 43 is provided with outward sharp depressions cooperating with corresponding centering pistons 5| urged by return-springs ported in said. second chuck.

by acting upon the journal 42, causes the box 43 to'rotate through degrees. In Fig. 6 there is indicated by dash-and-dot lines an intermediate position of the box. At the moment of leaving the incline 53, the button 48 is at the external end of the guide-slot 49. The incline 54, which is located beyond the position of discharge, will cause the'carrier box to return to its initial position.

By suppressing the inclines '53 and 54 there would also be suppressed the advantage of turning the work longitudinally through 180 degrees, what would amount to coming back to the case of Fig. 1. V

What is claimedis: f

1. In an automatic lathe'having a frame, the combination of a;first chuck and a tool-carrying turret revolubly mounted on the frame; a second chuck rotatably mounted on said frame; prehensile means mounted on the turret for transferring a work piece from the first chuck to the second chuck when said turret is rotated through 'a movementof 180; and an auxiliary machining unitmountedon the frame of said lathe for machining said work; piece when sup- 2. In an automatic lathe, the combination of a first chuck and'a tool-supporting turret revolubly mounted on the lathe;f'a second chuck rotatably mounted on said lathe; prehensile means operably mounted on the turret for transferring a work piece from the first chuck to the second chuck when said turret revolves. through substantially 180; and" an. auxiliary machining unit mounted on saidlathe and including a rotatable tool having an axis of rotation extending in an angular direction with respect to the longitudinal operating axis of said lathe.

3. In an automatic lath'e having a frame, the combination 'of a first chuck and a tool-carry-, ing turret revolubly mounted on the frame; a second chuck rotatably mounted on said frame; prehensile means mounted "'on the turret for transferring a work piece fromfthe first chuck to the second chuck when said turret is rotated through a movement of 180;- means cooperating with said prehensile means for effecting reversal of the work piece through a movement of 180? during the transferring operation of said turret; and an auxiliary rotary tool slidably mounted upon said lathe and adapted to en-' gage said work piece when supported in said second chuck in a direction'disposed 'at an 'angle' to the longitudinal operating axis of said lathe. 4. In an automatic lathe having aframe, the

combination of a first chuck and a tool-carrying turret revolubly mounted on the frame; a second chuck rotatably mounted on'said frame; prehensile means mounted on the turret for transferring a work piece from the first chuck to the second chuck when. said turret is rotated through a movement.of..'180?;fmeans cooperating with said prehensile means for. effectingreversal of the work piece through a movement of 180 during the transferring operation of said turret; and an auxiliary machining unit mounted on the frame of said lathe for machining said work piece when the latter is supported in said second chuck in the same relative spatial position as when supported in the first chuck.

5. In an automatic lathe having a frame, the combination of a first chuck and a tool-carrying turret revolubly mounted on the frame; a second chuck rotatably mounted on said frame; a rigid member fixed on the periphery of the turret; a cage pivotally mounted on the rigid member; prehensile means supported in the cage for gripping and releasing a work piece; means operatively disposed in proximate association with the cage for effecting reversal of said cage through a movement of 180 during revolution of said turret for transferring the work piece from the first chuck to the second chuck; and an auxiliary machining unit mounted on the frame of said lathe for machining said work piece when the latter'is supported in said second chuck in the same relative spatial position as when supported in the first chuck.

GEORGES EMILE CU'ITAT.

REFERENCES CITED The following references are of record in file of this patent:

UNITED STATES PATENTS the 

